Fan-motor oscillator.



C.AALBORG.

FAN MOTOR OSCILLATOR.

APPLICATION FILED JAN.7,191L

Patented Oct. 1, 1912.

2 MEETS-SHEET 1.

' INVENTOR G. AALBORG.

FAN MOTOR OSCILLATOR.

APPLICATION FILED JAN. 7. 1911.

1,039,682. Patented Oct. 1,1912.

2 SHEETS-SHEET 2.

WITNESSES:

a I Q INVENTOR ATTORN EY UNITED STATES CHRISTIAN AALBoRe, on WILKINSBURG,

rnNNsirLvAma, AssIeNon To WESTING- "nousn ELECTRIC Am) MANUFACTURING COMPANY, ACORPORATION, OEPENN- SYLVANIA.

Specification of Letters Patent.

FAN-MOTOR OSCILLATOR.

Patented Oct. 1, 1912;

Application filed January 7, 1911. Serial No. 601,369.

' To all whom it may concern:

Be it known that I, CHRISTIAN AALBono. a citizen of the United States, and a resident of Vilkinsburgfin the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in F an-Motor Oscillators, of which the following is a specification.

My invention relates to fan motors of the oscillating type and it has particular rcfer.

ence to mechanical oscillating devices; of this general class.

The object-of my invention is to provide a simple and readily adjustable device of the above indicated character which shall embody efficient and adequate means for-securing the required oscillatory movement from the shaft of the driving motor.

According to my invention, 1 provide a fan motor which embodies an arrangement of worms, worm wheels and shafts whereby the high speed rotational movement of the motor shaft is greatly reduced and imparted to a suitablecrank arm which is associated with the base of the motor by means ofa connecting rod in such manner that, as the crank arm is slowly rotated, oscillatory movement of the fan motor is efiected. Furthermore, the oscillating mechanism is so arranged that it interferes in no way with the ready tiltingadjustment of the fan. Additional means are provided whereby the angle of oscillation may be varied or, if desired, the oscillatory feature may be dispensed with and the fan operated in a fixed position. i

In the accompanying drawings, Figure 1 is a view, partially in side elevation and partially in section, of a fan motor structed in accordance with my invention, and Fig. 2 is aback view, partially in elevation and partially in vertical section of the device shown in Fig. 1. Fig. 3 is a view, partially in plan and partially in horizontal cross section. of-the gear cases shown in Figs. 1 and 2, the two members being shown slightly separated for clearness. Fig. 4 is a sectional view on the plane indicating line III ITT in Fig. 1.

Referring to the drawings in detail, the device here shown comprises a motor 1, a yoke 2, a base.3 and a mechanical oscillating device 4. The motor 1 may be of any well known type of construction and is pivotally mounted between upwardly projecting- .which meshes with'theworm 20.

, arms 5 of the yoke member 2 upon trunnion supports 6, in such manner that it is readily adjustable about a horizontal axis at right angles to the motor shaft 7. A body. member 8of the yoke 2 rests upon an adjustable collar 9 which surrounds an upper portion 9* of the base 3 and is provided with a pin 1 in base 3.

- The mechanical oscillating device 4 com-. prises the motor shaft 7, an intermediate shaft'12, a'crank shaft 13,'a crank'arm 14, a swiveled link 15, a connecting rod 16, a guide'link 17 and the necessary worms and worm wheels associated with shafts 7,12

and 13 to transmit power from the'motor shaft -7 to the crank arm 14. the motor shaft 7 is provided with a suitable fan 19 and its other" end is provided with a worm 20 whichis rigidly associated there- I with. The intermediate shaft 12 is disposed in ahorizontalplane at right angles to the motor shaft 7 and carries a worm wheel 21 A second worm 22 is rigidly connected to the worm wheel 21 by means of a sleeve 22 and is coaxially related thereto. Furthermore, the worm 22, the sleeve 22 and worm wheel 21 are loosely mounted upon the shaft 12- for a reason-tobe hereinafter set forth.

The crank shaft 13 is disposed in a verti cal plane and-its upper end carries a worm wheel 23 which is adapted to mesh'with the worm 22 in the usual manner, while its lower end is provided with the crank arm or disk 1 14. having a fixed connection thereto. The & disk or crank arm 14 is provided with a plurality of, recesses 24, 25 and 26, which are of the same size and suitably threaded. will be observed that the. threaded receL is-located-in the center of the disk 14 and coaxially with the crank shaft 13, while reeesses 24 and 26 are disposed at different dis:

tances from the center of the crank shaft for a purpose to, be hereinafter set forthr-As shown, a pin 27 extends through an opening 28 in the swivel link 15 and is screwed into the threaded recess 24. The connecting rod '16 is pivotally associated with the swivel link 15 by means of a pin 29, and is also similarly connected to the adjustable collar 9 by means of apin 30. The pin 30 is screwed into a shaft or stud 31 which is rotatably mounted between laterally prolOywhich is rotatably fitted "into a recess 11.

One end of jecting arms 32 and 33 of the collar 9. The 116 collar 9, which is adjustable in a horizontal plane, may be readil fixed to the base 3 through the agency 0 a set screw 35.

A protecting casing or cover 36 is provi'ded for the worm 20 and its cooperating wheel '21 and is screwed to the frame of motor 1 by means of screws 37. One end of the casing 36 is provided with a threaded recess 38 to receive one end 38 of the intermediate shaft 12, while the other end of said casing embodies a cylindrical recess 39 to receive a cooperating extending portion 40 which forms an integral part of a pro-- tepting casing 41 for the worm 22, wheel 23 and crank shaft 13. The opposite end 42 of the intermediate stationary shaft 12 projects through an outer wall 43 of the casing 41 and is fitted with a suitable wing nut 44, whereby the cooperating portions 39 and 40 of the casings 36 and 41, respectively, may be securely locked together.

In order that the motor 1 may be adjusted about its trunnion supports 6 without interfering with the operative relationships of the reduction gearing hereinbefore described, one end of the guide link 17 is pivotally connected to the lower portion 45 of the casing 41 by a screw 46, and its other end is similarly connected to the yoke 2 by means of a screw 47 The length of the link 17, from center to center, is just equal to the distance between the axis of the trunnion supports G'and the axis of the intermediate shaft 12, while the distance between the axis of the trunnion supports 6 and the center of the pin 47 is equivalent to that between theaxis of shaft 12 and the center of pin 46. Hence, a parallel-motion linkage is obtained, whereby the crank shaft 13 is always maintained in a vertical position and in operative relationship with its cooperating parts, throughout all tilting adjustments of the motor 1, as will be readily understood.

Assuming the motor 1" to be operating and the various parts of the device to occupy the positions shown, it is evident that the rotational movement of the motor shaft 7 is transmitted to the crank arm or disk 14 through the agency of the interposed reducing mechanism hereinbefore described. By reason of the eccentric and swiveled connection between one end of the connecting rod 16 and the crank arm 14, it is evident that, as the crank arm 14 is slowly rotated, the motor 1 and yoke 2 are gradually actuated in a horizontal plane, first in one direction and then in the other, whereby an oscillatory movement is effected, according to well known practice. The angle of oscillation will, of course, depend upon the eccentricity of the crank arm connection, which may be varied by associating'the pin 27 with the threaded recess 26 or with the recess 25. Those skilled in the art will readily under the v recess 26, a greater eccentricity is obtained and, hence, the angle of oscillation is increased, whereas by employing the center recess 25, no oscillatory movement of the fan is eflected and, hence, it may be operated in a fixed position. I

In order to adjust the fan motor 1 in a vertical plane about its trunnion supports 6 the wing nut 44 is loosened, thereby releasing the cooperating members 39 and 40 of the inclo'sing casings 36 and 41, respectively. Any adjustments ma then be made, the connect-ing rod 216 assuming the position shown in dot and dash lines A in Fig. 1 if the motor be tilted upward, and assuming the position shown by dot and dash lines B in Fig. 1 if a downward adjustment be made, During either adjustment, the crank shaft 13 is maintained in a vertical position which are perpendicular to the axis of oscillation of the yoke, of oscillating means comprising a crank shaft, reduction gearing interposed between said crank shaft and the motor armature shaft, a connect-ing rod havin one end ivoted to said base and havin b P o its other end pivotally and eccentrically connected tov said crank shaft, and means for maintaining the crank shaft parallel to the axis of oscillation during all adjustments of the motor upon its trunnions.

2. The combination with a base, a yoke rotatively mounted thereon for oscillatory movement, a motor pivotally mounted in said yoke, a vertical crank shaft, mechanical means associated with the motor shaft for imparting rotational movement to said crank shaft, and a connecting rod pivotally secured to said base and having an eccentric connection to said crank shaft, of means for maintaining said crank shaft parallel to the axis of oscillation of said yoke, irrespective of the pivotal adjustments of said motor.

3. The combination with a supporting base, a motor rotatively mounted thereon for oscillatory movement and adjustable about an axis that is normal to the motor shaft, a crank shaft the axis of which is parallel to the oscillation axis of the motor, a double worm and wheel reduction gear in terposed between said motor shaft and said crank shaft, and a rod eccentrically connected to said crank shaft and pivotally connected to said supporting base, of means for maintaining the aforesaid cooperating parts in operative relationship under all conditions of motor adjustment. 7

4;. The combination with a supporting base, a yoke rotatably mounted thereon for oscillation, a motor pivotally mounted in said yoke for adjustment upon an axis that is perpendicular to the axis of oscillation, of mechanical means for oscillating said yoke and said motor, said means comprising a crank arm, means interposed between said motor shaft and said crank arm for rotating said crank arm, means connecting said crank arm and said supporting base and a parallel motion linkage associated with said motor and said yoke for maintaining the operative relationship of the component parts of said mechanical means under all conditions of motor adjustment.

5. The combination with a base, a supportmember pivo-tally mounted thereon for oscillatory movement, motor mounted on said'supporting member and adapted for adjustment about an axis that is normal to the motor shaft, and means for oscillating said supporting member on said base, said means comprising a worm fixed to said motor shaft, a worm wheel meshing witlisaid worm and rigidly associated with a second worm mounted co-axially therewith, a second worm wheel cooperating with said last named worm and rigidly fixed to a crank shaft, a crank arm rigidly associated with said crank shaft, and a connecting rod pivotally secured to said crank arm and to said base, of a guide link associated with said supporting member and said crank shaft for maintaining said crank shaft parallel to the axis of oscillation under all adjustments of said motor.-

In testimony whereof, I have hereunto subscribed my name this 29th day of Dec. 1910.,

, CHRISTIAN Witnesses ALVA Somme, 3 times. 

